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zynq_clocking: Allow ext signal to set cur_clk csr 

- for example, current_clock csr can be connected to tx_init.done
This commit is contained in:
linuswck 2023-11-07 15:40:50 +08:00 committed by sb10q
parent 07044752b6
commit e6372b9766
1 changed files with 5 additions and 2 deletions
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7
src/gateware/zynq_clocking.py
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@ -65,7 +65,7 @@ class ClockSwitchFSM(Module):
class SYSCRG(Module, AutoCSR): class SYSCRG(Module, AutoCSR):
def __init__(self, platform, ps7, main_clk, clk_sw=None, freq=125e6, ext_async_rst=None): def __init__(self, platform, ps7, main_clk, clk_sw=None, clk_sw_status=None, freq=125e6, ext_async_rst=None, ):
# assumes bootstrap clock is same freq as main and sys output # assumes bootstrap clock is same freq as main and sys output
self.clock_domains.cd_sys = ClockDomain() self.clock_domains.cd_sys = ClockDomain()
self.clock_domains.cd_sys4x = ClockDomain(reset_less=True) self.clock_domains.cd_sys4x = ClockDomain(reset_less=True)
@ -148,4 +148,7 @@ class SYSCRG(Module, AutoCSR):
) )
self.specials += Instance("IDELAYCTRL", i_REFCLK=ClockSignal("clk200"), i_RST=ic_reset) self.specials += Instance("IDELAYCTRL", i_REFCLK=ClockSignal("clk200"), i_RST=ic_reset)
self.comb += self.current_clock.status.eq(self.clk_sw_fsm.o_clk_sw) if clk_sw_status is None:
self.comb += self.current_clock.status.eq(self.clk_sw_fsm.o_clk_sw)
else:
self.comb += self.current_clock.status.eq(clk_sw_status)